Page 1 of 39 12311 ... LastLast
Results 1 to 10 of 389

Thread: CPATCH12: The most compact long range 1.2GHz antenna

  1. #1

    CPATCH12: The most compact long range 1.2GHz antenna

    I’m really pleased to announce that the 1.2GHz circularly polarized patch antenna, CPATCH12, in which we have been working for a very long time, is finally ready to launch:





    At 8.6dB, it doesn’t give the ultimate range of the HELIAXIAL12, but its compact size and its 90 wide beam make it ideal for compact lightweight ground stations, and it still provides crystal clear video up to 30 Km (when coupled with a >500mW VTx with a SPW12).

    It is designed to be directly attached to a tripod, with the video receiver velcroed in the back:





    It is supplied with a SMA pigtail to connect to the receiver, and individually packed in a cardboard box with bubble plastic inside.


    SIZE AND WEIGHT

    Size: 130x158x28 mm
    Weight: 120 grams


    BANDWIDTH

    This is the graph of the Return Loss parameter of the CPATCH12 antenna, designed to cover the channels from 1200 to 1330 MHz.



    It is possible to use it at 1360MHz channel, but a small reduction in performance should be expected.


    DIRECTIVITY



    It has a directive radiation pattern, with a maximum gain of 8.6dB, and a beamwidth of +/-45 (total beam width of 90) in the XZ and YZ plane.


    OPPOSITE POLARIZATION REJECTION




    This is especially important in circular polarization. In a simple way: the difference between co-polar component (blue, right hand circular in this case) and cross-polar (red, left hand circular) is the attenuation that the antenna will introduce when capturing the reverse polarization, which will come from the reflected signal that we want to avoid to reduce multipath. In these antennas this rejection is bigger than 12dB in all cases, which means that the reflected signal will reach the emitter attenuated at least 12dB compared with the desired signal.


    AVAILABILITY

    Next week we will start shipping them to our resellers, and make it available through our website.
    Last edited by sircana; 19th May 2014 at 09:43 AM.

  2. #2
    Navigator Siv's Avatar
    Join Date
    Jan 2014
    Location
    Richmond, TX
    Posts
    344
    Beautiful!

    How "bump" resistant is it? Really the question I'm asking is if it falls of the tripod are there any elements to get jarred off or anything like that?

  3. #3
    Cor blimey, guv'nor!
    Join Date
    Mar 2011
    Posts
    2,372
    BRILLIANT !!

  4. #4
    Kiwi in Germany whakahere's Avatar
    Join Date
    Feb 2011
    Location
    Germany
    Posts
    3,519
    drool. now that is an antenna I would want. Is it being sold in europe?
    Whaka's Tinkerings blog --> http://fpvlab.com/forums/showthread.php?36623-Whaka-s-Tinkering&p=631753#post631753
    Battle H Virus (home build basher quad tutorial) --> ]http://fpvlab.com/forums/showthread.php?12544-Tutorial-Battle-H-Virus
    Range record on 5.8ghz 200mw 24km --> http://www.rcgroups.com/forums/showthread.php?t=1441664

    The one thing I know how to do well with FPV - crash. All in a day of fun!
    I believe landing is a full body experience .... I do my best to aim for your body.

  5. #5
    Drone X Labs Team Pilot wyll's Avatar
    Join Date
    Jan 2013
    Location
    Humboldt
    Posts
    450
    now lets see whats inside it
    Last edited by wyll; 19th May 2014 at 12:05 PM.
    If you didn't build it, don't fly it!!!!
    also

    My Stuff : https://www.youtube.com/channel/UC9F..._as=subscriber

  6. #6
    Engineer for Jesus Christ IBCrazy's Avatar
    Join Date
    Mar 2011
    Location
    Amherst, VA
    Posts
    7,352
    Very nice! I see you are using an air-space medium as well! This is excellent work, Juan.

    If I might ask, is this a K5OE style or is it a different style of antenna?

    -Alex
    If it is broken, fix it. if it isn't broken, I'll soon fix that.

    videoaerialsystems.com - Performance video piloting

  7. #7
    Quote Originally Posted by Siv View Post
    Beautiful!

    How "bump" resistant is it? Really the question I'm asking is if it falls of the tripod are there any elements to get jarred off or anything like that?
    I would say it's very hard to break it. Breaking one of the plates would require a huge impact. Maybe a very high compression force could damage the feed point solder. But I would say you can play tennis with it.


    Quote Originally Posted by whakahere View Post
    drool. now that is an antenna I would want. Is it being sold in europe?
    Of course. We already have got an order from one of our european resellers.


    Quote Originally Posted by IBCrazy View Post
    Very nice! I see you are using an air-space medium as well! This is excellent work, Juan.

    If I might ask, is this a K5OE style or is it a different style of antenna?

    -Alex
    Thanks Alex. But not my work, in fact.

    I let the guys from the University do all the job. Two PhD did all the design, simulation and testing. The main challenge was reducing the form factor as much as possible, getting a bandwidth wide enough, and keeping a good axial ratio across the whole bandwidth and the whole beamwidth.

    Almost one year since I challenged them with these needs. Let's say it's not just a standard truncated square CP patch...

  8. #8
    Cor blimey, guv'nor!
    Join Date
    Mar 2011
    Posts
    2,372
    Quote Originally Posted by sircana View Post
    Thanks Alex. But not my work, in fact.

    I let the guys from the University do all the job. Two PhD did all the design, simulation and testing. The main challenge was reducing the form factor as much as possible, getting a bandwidth wide enough, and keeping a good axial ratio across the whole bandwidth and the whole beamwidth.

    Almost one year since I challenged them with these needs. Let's say it's not just a standard truncated square CP patch...
    Darn! There goes my pipe-dream for a 980MHz version! Stunning work though!

  9. #9
    Kiwi in Germany whakahere's Avatar
    Join Date
    Feb 2011
    Location
    Germany
    Posts
    3,519
    Quote Originally Posted by sircana View Post
    Of course. We already have got an order from one of our european resellers.
    yuppie ... i hope like hell it isn't electronicarc! those thieving assholes stole 300 euro off me. Never got any goggles from them ....
    Whaka's Tinkerings blog --> http://fpvlab.com/forums/showthread.php?36623-Whaka-s-Tinkering&p=631753#post631753
    Battle H Virus (home build basher quad tutorial) --> ]http://fpvlab.com/forums/showthread.php?12544-Tutorial-Battle-H-Virus
    Range record on 5.8ghz 200mw 24km --> http://www.rcgroups.com/forums/showthread.php?t=1441664

    The one thing I know how to do well with FPV - crash. All in a day of fun!
    I believe landing is a full body experience .... I do my best to aim for your body.

  10. #10
    Engineer for Jesus Christ IBCrazy's Avatar
    Join Date
    Mar 2011
    Location
    Amherst, VA
    Posts
    7,352
    Quote Originally Posted by sircana View Post
    Thanks Alex. But not my work, in fact.

    I let the guys from the University do all the job. Two PhD did all the design, simulation and testing. The main challenge was reducing the form factor as much as possible, getting a bandwidth wide enough, and keeping a good axial ratio across the whole bandwidth and the whole beamwidth.

    Almost one year since I challenged them with these needs. Let's say it's not just a standard truncated square CP patch...
    I see... So this is not a K5OE (vector driven) version, but another perhaps slotted type. Very nice work. It looks phenomenal too

    -Alex
    If it is broken, fix it. if it isn't broken, I'll soon fix that.

    videoaerialsystems.com - Performance video piloting

Similar Threads

  1. Long range fpv antenna installation
    By nghfpvlab in forum NGHobbies
    Replies: 8
    Last Post: 12th April 2014, 11:27 AM
  2. Show your Long Range Antenna mounting/placement on Quad
    By Stiefel in forum FPV Long Range
    Replies: 2
    Last Post: 7th May 2013, 11:02 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •